Abstract: The antenna system of an aerial vehicle SAR is suspended under the fuselage as a pod. It features high power consumption, high heat load and confined assembly space etc., and has no environment control system. This paper introduces the heat pipe technology and utilizes forced convection caused by the relative movement between dome and air to solve the heat dissipation problem of the antenna. Numerical simulation and flight test indicate that the design is reasonable, and could meet the thermal design demands. This heat dissipation method is simple, economical and effective, especially suitable for small pods assembled on the aerial vehicle with low velocity.